What does the idiom 'Let the cat out of the bag' mean?

A person who does not believe in God is called:

Choose the correctly corrected sentence: 'The news are very shocking.'

Choose the correct preposition: She apologized ____ being late.

Fill in the blank: The committee ____ its decision yesterday.

Fill in the blank: Neither the manager nor the employees ____ satisfied.

Choose the word most similar in meaning to 'Adversity'.

Choose the word most opposite in meaning to 'Expand'.

Choose the word most opposite in meaning to 'Permit'.

Choose the word most opposite in meaning to 'Timid'.

Choose the correct preposition: He was accused ____ theft.